Oct. 14 (UPI) -- The Trump administration recently began charging fees for Chinese ships docking at U.S. ports, prompting China to retaliate. The move, which has been long planned, is intended to correct the imbalance between American and Chinese shipbuilding businesses . The U.S. shipbuilding business has dwindled over the years as China has become dominant. On Friday, China vowed reciprocal fees on American-made ships in its ports. "This is symbolic -- less than 1% of U.S. vessels docking in